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1) A 0.177 kg mass is on a spring that causes the frequency of oscillation to be 71 cycles per second. The maximum velocity is 60.9 m/s. What is the maximum force on the mass?

a) 2.2 x 103 N

b) 4.8 x 103 N

c) 1 x 104 N

d) 2.2 x 104 N

e) 4.8 x 104 N

2) A spring with spring constant 7.8 kN/m is attached to a 2.5 gram mass. The maximum acelleration is 6.8 m/s2. What is the maximum displacement?

a) 6.89 x 10-7 m

b) 2.18 x 10-6 m

c) 6.89 x 10-6 m

d) 2.18 x 10-5 m

e) 6.89 x 10-5 m

3) A spring of spring constant 2.1 kN/m causes a mass to move with a period of 1.4 ms. The maximum displacement is 6.6 mm. What is the maximum kinetic energy?

a) 1.45 x 10-3 J

b) 4.57 x 10-3 J

c) 1.45 x 10-2 J

d) 4.57 x 10-2 J

e) 1.45 x 10-1 J

4) A spring with spring constant 1.1 kN/m undergoes simple harmonic motion with a frequency of 8.4 kHz. The maximum force is 3.8 N. What is the total energy?

a) 6.56 x 10-4 J

b) 2.08 x 10-3 J

c) 6.56 x 10-3 J

d) 2.08 x 10-2 J

e) 6.56 x 10-2 J

5) The temperature is -2.9 degrees Celsius, and you are standing 0.76 km from a cliff. What is the echo time?

a) 3.395 x 100 seconds

b) 3.666 x 100 seconds

c) 3.959 x 100 seconds

d) 4.274 x 100 seconds

e) 4.615 x 100 seconds

6) While standing 0.94 km from a cliff, you measure the echo time to be 5.522 seconds. What is the temperature?

a) 1.57 x 101Celsius

b) 1.81 x 101Celsius

c) 2.09 x 101Celsius

d) 2.41 x 101Celsius

e) 2.79 x 101Celsius

7) What is the speed of a transverse wave on a string if the string is 1.19 m long, clamped at both ends, and harmonic number 6 has a frequency of 834 Hz?

a) 2.25 x 102 unit

b) 2.73 x 102 unit

c) 3.31 x 102 unit

d) 4.01 x 102 unit

e) 4.86 x 102 unit

8) What is the magnitude of the electric field at the origin if a 3 nC charge is placed at x = 8.8 m, and a 2.9 nC charge is placed at y = 6.9 m?

a) 4.87 x 10-1N/C

b) 5.62 x 10-1N/C

c) 6.49 x 10-1N/C

d) 7.49 x 10-1N/C

e) 8.65 x 10-1N/C

9) What angle does the electric field at the origin make with the x-axis if a 1.8 nC charge is placed at x = -6.9 m, and a 2.5 nC charge is placed at y = -7.5 m?

a) 2.79 x 101degrees

b) 3.22 x 101degrees

c) 3.72 x 101degrees

d) 4.3 x 101degrees

e) 4.96 x 101degrees

10) A dipole at the origin consists of charge Q placed at x = 0.5a, and charge of -Q placed at x = -0.5a. The absolute value of the x component of the electric field at (x,y) =( 6a, 5a) is βkQ/a2, where β equals

a) 1.09 x 10-3 unit

b) 1.33 x 10-3 unit

c) 1.61 x 10-3 unit

d) 1.95 x 10-3 unit

e) 2.36 x 10-3 unit

11) A dipole at the origin consists of charge Q placed at x = 0.5a, and charge of -Q placed at x = -0.5a. The absolute value of the y component of the electric field at (x,y) =( 1.1a, 1.2a) is βkQ/a2, where β equals

a) 1.61 x 10-1 unit

b) 1.95 x 10-1 unit

c) 2.36 x 10-1 unit

d) 2.86 x 10-1 unit

e) 3.47 x 10-1 unit

12) A parallel plate capacitor has both plates with an area of 0.55 m2. The separation between the plates is 0.53mm. Applied to the plates is a potential difference of 4.25 kV. What is the capacitance?

a) 6.95 nF.

b) 7.99 nF.

c) 9.19 nF.

d) 10.57 nF.

e) 12.15 nF.

13) The same parallel plate capacitor, with area 1.45 m2, plate separation 0.93mm, and an applied voltage of 4.45 kV. How much charge is stored?

a) 40.39 μC.

b) 46.45 μC.

c) 53.42 μC.

d) 61.43 μC.

e) 70.65 μC.

14) A 0.9 Farad capacitor is charged with 1.1 Coulombs. What is the value of the electric field if the plates are 0.3 mm apart?

a) 2.68 kV/m.

b) 3.08 kV/m.

c) 3.54 kV/m.

d) 4.07 kV/m.

e) 4.69 kV/m.

15) A 1.4 Farad capacitor charged with 2.3 Coulombs. What is the energy stored in the capacitor if the plates are 0.6 mm apart?

a) 1.08 J.

b) 1.24 J.

c) 1.43 J.

d) 1.64 J.

e) 1.89 J.

16) A 0.8 Farad capacitor charged with 1.7 Coulombs. What is the force between the plates if they are 0.5 mm apart?

a) 2065 N.

b) 2375 N.

c) 2732 N.

d) 3141 N.

e) 3613 N.

17) How fast is a 2663 eV electron moving?

a) 3.1 x 107 m/s.

b) 4.6 x 107 m/s.

c) 6.9 x 107 m/s.

d) 1 x 108 m/s.

e) 1.5 x 108 m/s.

18) A proton is accelerated (at rest) from a plate held at 333.6 volts to a plate at zero volts. What is the final speed?

a) 1.1 x 105 m/s.

b) 1.7 x 105 m/s.

c) 2.5 x 105 m/s.

d) 3.8 x 105 m/s.

e) 5.7 x 105 m/s.

19) What voltage is required accelerate an electron at rest to a speed of 1.7 x 105 m/s?

a) 1.6 x 10-2 volts

b) 2.4 x 10-2 volts

c) 3.7 x 10-2 volts

d) 5.5 x 10-2 volts

e) 8.2 x 10-2 volts

20) What voltage is required to stop a proton moving at a speed of 8.1 x 104 m/s?

a) 3.4 x 101 volts

b) 5.1 x 101 volts

c) 7.7 x 101 volts

d) 1.2 x 102 volts

e) 1.7 x 102 volts

21) A 1.4 volt battery moves 87 Coulombs of charge in 2 hours. What is the power?

a) 7.85 x 10-3 W

b) 9.51 x 10-3 W

c) 1.15 x 10-2 W

d) 1.4 x 10-2 W

e) 1.69 x 10-2 W

22) The diameter of a copper wire is 7.4 mm, and it carries a current of 38 amps. What is the drift velocity if copper has a density of 8.8E3 kg/m3 and an atomic mass of 63.54 g/mol? (1 mol = 6.02E23 atoms, and copper has one free electron per atom.)

42) Two resistors are in parallel with a voltage source. How do their voltages compare?}

a) The voltage across both resistors is the same as the source.

b) None of these are true.

c) One has full voltage, the other has none.

d) The voltage across both resistors is half the voltage of the source.

43) A resistor consumes 5 watts, and its current is 10 amps. What is its voltage?

a) 15V.

b) 0.5V.

c) 10V.

d) 2V.

44) A resistor has 10 volts across it and 4 amps going through it. What is its resistance?}

a) 2.5Ω.{\displaystyle 2.5\Omega .}

b) None of these are true.

c) 3.5Ω.{\displaystyle 3.5\Omega .}

d) 4.5Ω.{\displaystyle 4.5\Omega .}

45) If you plot voltage vs. current in a circuit, and you get a linear line, what is the significance of the slope? }

a) Discriminant.

b) Resistance.

c) Power.

d) None of these are true.

46) A resistor has 3 volts across it. Its resistance is 1.5 ohms. What is the current?}

a) 3A

b) 12A

c) 1.5A

d) 2A

47) A resistor has 8 volts across it and 3 Amps going through it. What is the power consumed?}

a) 2.2W

b) 8W

c) 3W

d) 24W

48) A resistor has a voltage of 5 volts and a resistance of 15 ohms. What is the power consumed? }

a) 1.67 Watts

b) 11.67 Joules

c) 2.5 Watts

d) None of these are ture.

49) A resistor is on for 5 seconds. It consumes power at a rate of 5 watts. How many joules are used?}

a) 5 Joules

b) 3 Joules

c) None of these are true

d) 25 Joules

50) An ideal 4.2 V voltage source is connected to two resistors in parallel. One is 1.6kΩ{\displaystyle k\Omega }, and the other is 2.1 kΩ{\displaystyle k\Omega }. What is the current through the larger resistor?

a) 0.75 mA.

b) 0.86 mA.

c) 0.99 mA.

d) 1.14 mA.

e) 1.31 mA.

51) A 6.3 ohm resistor is connected in series to a pair of 3.4 ohm resistors that are in parallel. What is the net resistance?

a) 5.3 ohms.

b) 6 ohms.

c) 7 ohms.

d) 8 ohms.

e) 9.2 ohms.

52) Two 6.2 ohm resistors are connected in parallel. This combination is then connected in series to a 2.4 ohm resistor. What is the net resistance?

a) 3.1 ohms.

b) 3.6 ohms.

c) 4.2 ohms.

d) 4.8 ohms.

e) 5.5 ohms.

53) An ideal 7.4 volt battery is connected to a 0.074 ohm resistor. To measure the current an ammeter with a resistance of 12mΩ{\displaystyle m\Omega } is used. What current does the ammeter actually read?

a) 49.2 A.

b) 56.6 A.

c) 65.1 A.

d) 74.8 A.

e) 86 A.

54) A battery has an emf of 6.5 volts, and an internal resistance of 446 kΩ{\displaystyle k\Omega }. It is connected to a 3.5 MΩ{\displaystyle M\Omega } resistor. What power is developed in the 3.5 MΩ{\displaystyle M\Omega } resistor?

a) 8.26 μ{\displaystyle \mu }W.

b) 9.5 μ{\displaystyle \mu }W.

c) 10.92 μ{\displaystyle \mu }W.

d) 12.56 μ{\displaystyle \mu }W.

e) 14.44 μ{\displaystyle \mu }W.

55) A cosmic ray alpha particle encounters Earth's magnetic field at right angles to a field of 7.4 μT. The kinetic energy is 437 keV. What is the radius of particle's orbit?

a) 1.3 x 102 m.

b) 4.1 x 102 m.

c) 1.3 x 103 m.

d) 4.1 x 103 m.

e) 1.3 x 104 m.

56) Two parallel wires are 7.5 meters long, and are separated by 4.4 mm. What is the force if both wires carry a current of 14.8 amps?

a) 2.36 x 10-3 newtons

b) 7.47 x 10-3 newtons

c) 2.36 x 10-2 newtons

d) 7.47 x 10-2 newtons

e) 2.36 x 10-1 newtons

57) Blood is flowing at an average rate of 24.5 cm/s in an artery that has an inner diameter of 3.9 mm. What is the voltage across a hall probe placed across the inner diameter of the artery if the perpendicular magnetic field is 0.17 Tesla?

a) 5.14 x 10-5 Volts

b) 1.62 x 10-4 Volts

c) 5.14 x 10-4 Volts

d) 1.62 x 10-3 Volts

e) 5.14 x 10-3 Volts

58) An electron tube on Earth's surface is oriented horizontally towards magnetic north. The electron is traveling at 0.06c, and Earth's magnetic field makes an angle of 48.5 degrees with respect to the horizontal. To counter the magnetic force, a voltage is applied between two large parallel plates that are 59 mm apart. What must be the applied voltage if the magnetic field is 45μT?

a) 1.1 x 100 volts

b) 3.6 x 100 volts

c) 1.1 x 101 volts

d) 3.6 x 101 volts

e) 1.1 x 102 volts

59) Two orbiting satellites are orbiting at a speed of 83 km/s perpendicular to a magnetic field of 57 μT. They are connected by a cable that is 23 km long. A voltmeter is attached between a satellite and one end of the cable. The voltmeter's internal impedance far exceeds the net resistance through the ionosphere that completes the circuit. What is the measured voltage?

a) 8.98 x 104 volts.

b) 1.09 x 105 volts.

c) 1.32 x 105 volts.

d) 1.6 x 105 volts.

e) 1.93 x 105 volts.

60) An loop of wire with 92 turns has a radius of 0.39 meters, and is oriented with its axis parallel to a magetic field of 0.97 Tesla. What is the induced voltage if this field is reduced to 16% of its original value in 1.4 seconds?

a) 2.56 x 101 volts

b) 3.1 x 101 volts

c) 3.76 x 101 volts

d) 4.55 x 101 volts

e) 5.51 x 101 volts

61)

Shown is a corrective lens by a person who needs glasses. This ray diagram illustrates

a) how a farsighted person might see a distant object

b) how a nearsighted person might see a distant object

c) how a nearsighted person might see an object that is too close for comfort

d) how a farsighted person might see an object that is too close for comfort

62)

Shown is a corrective lens by a person who needs glasses. This ray diagram illustrates

a) how a farsighted person might see an object that is too close for comfort

b) how a nearsighted person might see an object that is too close for comfort

c) how a farsighted person might see a distant object

d) how a nearsighted person might see a distant object

63) In optics, normal means

a) to the left of the optical axis

b) to the right of the optical axis

c) perpendicular to the surface

d) parallel to the surface

64) The law of reflection applies to

a) flat surfaces

b) telescopes but not microscopes

c) both flat and curved surfaces

d) curved surfaces

e) only light in a vacuum

65) When light passes from air to glass

a) the frequency decreases

b) it does not bend

c) it bends towards the normal

d) it bends away from the normal

e) the frequency increases

66) When light passes from glass to air

a) it does not bend

b) the frequency decreases

c) it bends away from the normal

d) the frequency increases

e) it bends towards the normal

67) An important principle that allows fiber optics to work is

a) total external refraction

b) the Doppler shift

c) partial internal absorption

d) total internal reflection

e) the invariance of the speed of light

68) The focal point is where

a) rays meet whenever they pass through a lens

b) rays meet if they were parallel to the optical axis before striking a lens

c) rays meet whenever they are forming an image

d) the center of the lens

e) rays meet if they are parallel to each other

69) An object is placed 3.5 cm to the left of a diverging lens with a focal length of 5.6 cm. How far is the image from the lens?

a) 2.15 x 10-1 cm

b) 3.83 x 10-1 cm

c) 6.81 x 10-1 cm

d) 1.21 x 100 cm

e) 2.15 x 100 cm

70) An object is placed 4.65 cm to the left of a converging lens with a focal length of 6.2 cm. How far is the image from the lens?

a) 1.86 x 100 cm

b) 3.31 x 100 cm

c) 5.88 x 100 cm

d) 1.05 x 101 cm

e) 1.86 x 101 cm

71) An object of height 0.67 cm is placed 106 cm behind a diverging lens with a focal length of 61 cm. What is the height of the image?

a) 1.18 x 10-1 cm

b) 1.42 x 10-1 cm

c) 1.7 x 10-1 cm

d) 2.04 x 10-1 cm

e) 2.45 x 10-1 cm

72) An object is placed 10.9 cm to the left of a diverging lens with a focal length of 16.4 cm. On the side, at a distance of 6.8 cm from the diverging lens is a converging lens with focal length equal to 4 cm. How far is the final image from the converging lens?

a) 1.81 x 10-1 cm

b) 5.71 x 10-1 cm

c) 1.81 x 100 cm

d) 5.71 x 100 cm

e) 1.81 x 101 cm

73) Which lens has the shorter focal length?

a)

b)

c) They have the same focal lengh.

74) If this represents the eye looking at an object, where is this object?

a) One focal length in front of the eye

b) Two (of the other answers) are true

c) very far away

d) directly in front of the eye (almost touching)

e) at infinity

75) After passing through a the lens of a camera or the eye, the focal point is defined as where the rays meet.

a) false

b) true

76) Mr. Smith is gazing at something as shown in the figure to the left. Suppose he does not refocus, but attempts to stare at the star shown in the figures below. Which diagram depicts how the rays from the star would travel if he does not refocus?

a)

b)

c)

77) A 3.9 volt battery moves 90 Coulombs of charge in 2.2 hours. What is the power?

a) 4.43 x 10-2 W

b) 5.37 x 10-2 W

c) 6.51 x 10-2 W

d) 7.88 x 10-2 W

e) 9.55 x 10-2 W

78) The diameter of a copper wire is 3.6 mm, and it carries a current of 52 amps. What is the drift velocity if copper has a density of 8.8E3 kg/m3 and an atomic mass of 63.54 g/mol? (1 mol = 6.02E23 atoms, and copper has one free electron per atom.)

1) A 0.177 kg mass is on a spring that causes the frequency of oscillation to be 71 cycles per second. The maximum velocity is 60.9 m/s. What is the maximum force on the mass?

-a) 2.2 x 103 N

+b) 4.8 x 103 N

-c) 1 x 104 N

-d) 2.2 x 104 N

-e) 4.8 x 104 N

2) A spring with spring constant 7.8 kN/m is attached to a 5.7 gram mass. The maximum acelleration is 5.9 m/s2. What is the maximum displacement?

-a) 1.36 x 10-7 m

-b) 4.31 x 10-7 m

-c) 1.36 x 10-6 m

+d) 4.31 x 10-6 m

-e) 1.36 x 10-5 m

3) A spring of spring constant 6.9 kN/m causes a mass to move with a period of 8.6 ms. The maximum displacement is 2.3 mm. What is the maximum kinetic energy?

-a) 5.77 x 10-3 J

+b) 1.83 x 10-2 J

-c) 5.77 x 10-2 J

-d) 1.83 x 10-1 J

-e) 5.77 x 10-1 J

4) A spring with spring constant 1.1 kN/m undergoes simple harmonic motion with a frequency of 8.4 kHz. The maximum force is 3.8 N. What is the total energy?

-a) 6.56 x 10-4 J

-b) 2.08 x 10-3 J

+c) 6.56 x 10-3 J

-d) 2.08 x 10-2 J

-e) 6.56 x 10-2 J

5) The temperature is -1.4 degrees Celsius, and you are standing 0.94 km from a cliff. What is the echo time?

-a) 4.883 x 100 seconds

-b) 5.272 x 100 seconds

+c) 5.693 x 100 seconds

-d) 6.147 x 100 seconds

-e) 6.637 x 100 seconds

6) While standing 0.66 km from a cliff, you measure the echo time to be 3.768 seconds. What is the temperature?

+a) 3.26 x 101Celsius

-b) 3.77 x 101Celsius

-c) 4.35 x 101Celsius

-d) 5.03 x 101Celsius

-e) 5.81 x 101Celsius

7) What is the speed of a transverse wave on a string if the string is 0.94 m long, clamped at both ends, and harmonic number 5 has a frequency of 715 Hz?

-a) 1.83 x 102 unit

-b) 2.22 x 102 unit

+c) 2.69 x 102 unit

-d) 3.26 x 102 unit

-e) 3.95 x 102 unit

8) What is the magnitude of the electric field at the origin if a 1.8 nC charge is placed at x = 9.6 m, and a 2 nC charge is placed at y = 8.7 m?

+a) 2.95 x 10-1N/C

-b) 3.41 x 10-1N/C

-c) 3.94 x 10-1N/C

-d) 4.55 x 10-1N/C

-e) 5.25 x 10-1N/C

9) What angle does the electric field at the origin make with the x-axis if a 2.9 nC charge is placed at x = -7.3 m, and a 1.7 nC charge is placed at y = -8.1 m?

+a) 2.55 x 101degrees

-b) 2.94 x 101degrees

-c) 3.4 x 101degrees

-d) 3.92 x 101degrees

-e) 4.53 x 101degrees

10) A dipole at the origin consists of charge Q placed at x = 0.5a, and charge of -Q placed at x = -0.5a. The absolute value of the x component of the electric field at (x,y) =( 6a, 5a) is βkQ/a2, where β equals

-a) 1.33 x 10-3 unit

+b) 1.61 x 10-3 unit

-c) 1.95 x 10-3 unit

-d) 2.36 x 10-3 unit

-e) 2.86 x 10-3 unit

11) A dipole at the origin consists of charge Q placed at x = 0.5a, and charge of -Q placed at x = -0.5a. The absolute value of the y component of the electric field at (x,y) =( 1.1a, 1.2a) is βkQ/a2, where β equals

+a) 3.47 x 10-1 unit

-b) 4.2 x 10-1 unit

-c) 5.09 x 10-1 unit

-d) 6.17 x 10-1 unit

-e) 7.47 x 10-1 unit

12) A parallel plate capacitor has both plates with an area of 1.45 m2. The separation between the plates is 1.53mm. Applied to the plates is a potential difference of 2.55 kV. What is the capacitance?

+a) 8.39 nF.

-b) 9.65 nF.

-c) 11.1 nF.

-d) 12.76 nF.

-e) 14.68 nF.

13) The same parallel plate capacitor, with area 1.35 m2, plate separation 1.23mm, and an applied voltage of 2.65 kV. How much charge is stored?

-a) 16.93 μC.

-b) 19.47 μC.

-c) 22.39 μC.

+d) 25.75 μC.

-e) 29.62 μC.

14) A 1.4 Farad capacitor is charged with 2.3 Coulombs. What is the value of the electric field if the plates are 0.6 mm apart?

-a) 1.57 kV/m.

-b) 1.8 kV/m.

-c) 2.07 kV/m.

-d) 2.38 kV/m.

+e) 2.74 kV/m.

15) A 0.9 Farad capacitor charged with 1.1 Coulombs. What is the energy stored in the capacitor if the plates are 0.3 mm apart?

-a) 0.44 J.

-b) 0.51 J.

-c) 0.58 J.

+d) 0.67 J.

-e) 0.77 J.

16) A 0.5 Farad capacitor charged with 1.6 Coulombs. What is the force between the plates if they are 0.7 mm apart?

-a) 3180 N.

+b) 3657 N.

-c) 4206 N.

-d) 4837 N.

-e) 5562 N.

17) How fast is a 2758 eV electron moving?

-a) 9.2 x 106 m/s.

-b) 1.4 x 107 m/s.

-c) 2.1 x 107 m/s.

+d) 3.1 x 107 m/s.

-e) 4.7 x 107 m/s.

18) A proton is accellerated (at rest) from a plate held at 767.8 volts to a plate at zero volts. What is the final speed?

-a) 1.1 x 105 m/s.

-b) 1.7 x 105 m/s.

-c) 2.6 x 105 m/s.

+d) 3.8 x 105 m/s.

-e) 5.8 x 105 m/s.

19) What voltage is required accelerate an electron at rest to a speed of 3 x 105 m/s?

-a) 1.7 x 10-1 volts

+b) 2.6 x 10-1 volts

-c) 3.8 x 10-1 volts

-d) 5.8 x 10-1 volts

-e) 8.6 x 10-1 volts

20) What voltage is required to stop a proton moving at a speed of 7.6 x 106 m/s?

+a) 3 x 105 volts

-b) 4.5 x 105 volts

-c) 6.8 x 105 volts

-d) 1 x 106 volts

-e) 1.5 x 106 volts

21) A 3.9 volt battery moves 90 Coulombs of charge in 2.2 hours. What is the power?

+a) 4.43 x 10-2 W

-b) 5.37 x 10-2 W

-c) 6.51 x 10-2 W

-d) 7.88 x 10-2 W

-e) 9.55 x 10-2 W

22) The diameter of a copper wire is 9.9 mm, and it carries a current of 41 amps. What is the drift velocity if copper has a density of 8.8E3 kg/m3 and an atomic mass of 63.54 g/mol? (1 mol = 6.02E23 atoms, and copper has one free electron per atom.)

42) Two resistors are in parallel with a voltage source. How do their voltages compare?}

-a) One has full voltage, the other has none.

+b) The voltage across both resistors is the same as the source.

-c) None of these are true.

-d) The voltage across both resistors is half the voltage of the source.

43) A resistor consumes 5 watts, and its current is 10 amps. What is its voltage?

-a) 10V.

+b) 0.5V.

-c) 15V.

-d) 2V.

44) A resistor has 10 volts across it and 4 amps going through it. What is its resistance?}

+a) 2.5Ω.{\displaystyle 2.5\Omega .}

-b) None of these are true.

-c) 3.5Ω.{\displaystyle 3.5\Omega .}

-d) 4.5Ω.{\displaystyle 4.5\Omega .}

45) If you plot voltage vs. current in a circuit, and you get a linear line, what is the significance of the slope? }

-a) Power.

-b) Discriminant.

-c) None of these are true.

+d) Resistance.

46) A resistor has 3 volts across it. Its resistance is 1.5 ohms. What is the current?}

-a) 12A

+b) 2A

-c) 3A

-d) 1.5A

47) A resistor has 8 volts across it and 3 Amps going through it. What is the power consumed?}

-a) 2.2W

-b) 3W

+c) 24W

-d) 8W

48) A resistor has a voltage of 5 volts and a resistance of 15 ohms. What is the power consumed? }

+a) 1.67 Watts

-b) 2.5 Watts

-c) 11.67 Joules

-d) None of these are ture.

49) A resistor is on for 5 seconds. It consumes power at a rate of 5 watts. How many joules are used?}

+a) 25 Joules

-b) 5 Joules

-c) None of these are true

-d) 3 Joules

50) An ideal 8.9 V voltage source is connected to two resistors in parallel. One is 2.1kΩ{\displaystyle k\Omega }, and the other is 4.4 kΩ{\displaystyle k\Omega }. What is the current through the larger resistor?

+a) 1.37 mA.

-b) 1.57 mA.

-c) 1.81 mA.

-d) 2.08 mA.

-e) 2.39 mA.

51) A 6.4 ohm resistor is connected in series to a pair of 7.4 ohm resistors that are in parallel. What is the net resistance?

+a) 10.1 ohms.

-b) 11.6 ohms.

-c) 13.4 ohms.

-d) 15.4 ohms.

-e) 17.7 ohms.

52) Two 7.8 ohm resistors are connected in parallel. This combination is then connected in series to a 5.4 ohm resistor. What is the net resistance?

+a) 9.3 ohms.

-b) 10.7 ohms.

-c) 12.3 ohms.

-d) 14.1 ohms.

-e) 16.3 ohms.

53) An ideal 5.7 volt battery is connected to a 0.054 ohm resistor. To measure the current an ammeter with a resistance of 13mΩ{\displaystyle m\Omega } is used. What current does the ammeter actually read?

-a) 64.3 A.

-b) 74 A.

+c) 85.1 A.

-d) 97.8 A.

-e) 112.5 A.

54) A battery has an emf of 5.3 volts, and an internal resistance of 428 kΩ{\displaystyle k\Omega }. It is connected to a 2.3 MΩ{\displaystyle M\Omega } resistor. What power is developed in the 2.3 MΩ{\displaystyle M\Omega } resistor?

-a) 4.96 μ{\displaystyle \mu }W.

-b) 5.71 μ{\displaystyle \mu }W.

-c) 6.56 μ{\displaystyle \mu }W.

-d) 7.55 μ{\displaystyle \mu }W.

+e) 8.68 μ{\displaystyle \mu }W.

55) A cosmic ray alpha particle encounters Earth's magnetic field at right angles to a field of 7.4 μT. The kinetic energy is 437 keV. What is the radius of particle's orbit?

-a) 1.3 x 102 m.

-b) 4.1 x 102 m.

-c) 1.3 x 103 m.

-d) 4.1 x 103 m.

+e) 1.3 x 104 m.

56) Two parallel wires are 7.5 meters long, and are separated by 4.4 mm. What is the force if both wires carry a current of 14.8 amps?

-a) 2.36 x 10-3 newtons

-b) 7.47 x 10-3 newtons

-c) 2.36 x 10-2 newtons

+d) 7.47 x 10-2 newtons

-e) 2.36 x 10-1 newtons

57) Blood is flowing at an average rate of 24.5 cm/s in an artery that has an inner diameter of 3.9 mm. What is the voltage across a hall probe placed across the inner diameter of the artery if the perpendicular magnetic field is 0.17 Tesla?

-a) 5.14 x 10-5 Volts

+b) 1.62 x 10-4 Volts

-c) 5.14 x 10-4 Volts

-d) 1.62 x 10-3 Volts

-e) 5.14 x 10-3 Volts

58) An electron tube on Earth's surface is oriented horizontally towards magnetic north. The electron is traveling at 0.06c, and Earth's magnetic field makes an angle of 48.5 degrees with respect to the horizontal. To counter the magnetic force, a voltage is applied between two large parallel plates that are 59 mm apart. What must be the applied voltage if the magnetic field is 45μT?

-a) 1.1 x 100 volts

-b) 3.6 x 100 volts

-c) 1.1 x 101 volts

+d) 3.6 x 101 volts

-e) 1.1 x 102 volts

59) Two orbiting satellites are orbiting at a speed of 52 km/s perpendicular to a magnetic field of 41 μT. They are connected by a cable that is 33 km long. A voltmeter is attached between a satellite and one end of the cable. The voltmeter's internal impedance far exceeds the net resistance through the ionosphere that completes the circuit. What is the measured voltage?

-a) 4.79 x 104 volts.

-b) 5.81 x 104 volts.

+c) 7.04 x 104 volts.

-d) 8.52 x 104 volts.

-e) 1.03 x 105 volts.

60) An loop of wire with 92 turns has a radius of 0.39 meters, and is oriented with its axis parallel to a magetic field of 0.97 Tesla. What is the induced voltage if this field is reduced to 16% of its original value in 1.4 seconds?

+a) 2.56 x 101 volts

-b) 3.1 x 101 volts

-c) 3.76 x 101 volts

-d) 4.55 x 101 volts

-e) 5.51 x 101 volts

61)

Shown is a corrective lens by a person who needs glasses. This ray diagram illustrates

-a) how a farsighted person might see a distant object

-b) how a farsighted person might see an object that is too close for comfort

-c) how a nearsighted person might see an object that is too close for comfort

+d) how a nearsighted person might see a distant object

62)

Shown is a corrective lens by a person who needs glasses. This ray diagram illustrates

+a) how a farsighted person might see an object that is too close for comfort

-b) how a farsighted person might see a distant object

-c) how a nearsighted person might see an object that is too close for comfort

-d) how a nearsighted person might see a distant object

63) In optics, normal means

-a) to the left of the optical axis

-b) parallel to the surface

-c) to the right of the optical axis

+d) perpendicular to the surface

64) The law of reflection applies to

-a) telescopes but not microscopes

-b) curved surfaces

+c) both flat and curved surfaces

-d) only light in a vacuum

-e) flat surfaces

65) When light passes from air to glass

+a) it bends towards the normal

-b) it bends away from the normal

-c) the frequency increases

-d) it does not bend

-e) the frequency decreases

66) When light passes from glass to air

-a) it bends towards the normal

-b) the frequency decreases

-c) the frequency increases

-d) it does not bend

+e) it bends away from the normal

67) An important principle that allows fiber optics to work is

-a) total external refraction

-b) the invariance of the speed of light

-c) the Doppler shift

-d) partial internal absorption

+e) total internal reflection

68) The focal point is where

-a) rays meet if they are parallel to each other

-b) rays meet whenever they pass through a lens

+c) rays meet if they were parallel to the optical axis before striking a lens

-d) rays meet whenever they are forming an image

-e) the center of the lens

69) An object is placed 6.3 cm to the left of a diverging lens with a focal length of 8.9 cm. How far is the image from the lens?

-a) 1.17 x 100 cm

-b) 2.07 x 100 cm

+c) 3.69 x 100 cm

-d) 6.56 x 100 cm

-e) 1.17 x 101 cm

70) An object is placed 3.15 cm to the left of a converging lens with a focal length of 6.7 cm. How far is the image from the lens?

-a) 3.34 x 100 cm

+b) 5.95 x 100 cm

-c) 1.06 x 101 cm

-d) 1.88 x 101 cm

-e) 3.34 x 101 cm

71) An object of height 0.67 cm is placed 107 cm behind a diverging lens with a focal length of 70 cm. What is the height of the image?

+a) 2.65 x 10-1 cm

-b) 3.18 x 10-1 cm

-c) 3.82 x 10-1 cm

-d) 4.58 x 10-1 cm

-e) 5.49 x 10-1 cm

72) An object is placed 12.1 cm to the left of a diverging lens with a focal length of 16.9 cm. On the side, at a distance of 6.7 cm from the diverging lens is a converging lens with focal length equal to 4 cm. How far is the final image from the converging lens?

+a) 5.64 x 100 cm

-b) 1.78 x 101 cm

-c) 5.64 x 101 cm

-d) 1.78 x 102 cm

-e) 5.64 x 102 cm

73) Which lens has the shorter focal length?

-a)

+b)

-c) They have the same focal lengh.

74) If this represents the eye looking at an object, where is this object?

-a) One focal length in front of the eye

+b) Two (of the other answers) are true

-c) very far away

-d) directly in front of the eye (almost touching)

-e) at infinity

75) After passing through a the lens of a camera or the eye, the focal point is defined as where the rays meet.

+a) false

-b) true

76) Mr. Smith is gazing at something as shown in the figure to the left. Suppose he does not refocus, but attempts to stare at the star shown in the figures below. Which diagram depicts how the rays from the star would travel if he does not refocus?

+a)

-b)

-c)

77) A 1.4 volt battery moves 87 Coulombs of charge in 2 hours. What is the power?

-a) 7.85 x 10-3 W

-b) 9.51 x 10-3 W

-c) 1.15 x 10-2 W

-d) 1.4 x 10-2 W

+e) 1.69 x 10-2 W

78) The diameter of a copper wire is 3.8 mm, and it carries a current of 88 amps. What is the drift velocity if copper has a density of 8.8E3 kg/m3 and an atomic mass of 63.54 g/mol? (1 mol = 6.02E23 atoms, and copper has one free electron per atom.)

↑_{A parallel plate capacitor has both plates with an area of 1.05 m2. The separation between the plates is 0.63mm. Applied to the plates is a potential difference of 2.85 kV. What is the capacitance?}

↑_{An ideal 5.2 V voltage source is connected to two resistors in parallel. One is 1.2kΩ{\displaystyle k\Omega }, and the other is 2.8 kΩ{\displaystyle k\Omega }. What is the current through the larger resistor?}

↑_{Two orbiting satellites are orbiting at a speed of 85 km/s perpendicular to a magnetic field of 56 μT. They are connected by a cable that is 29 km long. A voltmeter is attached between a satellite and one end of the cable. The voltmeter's internal impedance far exceeds the net resistance through the ionosphere that completes the circuit. What is the measured voltage?}